[gnome-user-docs] gnome-help: Printing: Some distros won't display an "Unlock" button

[Andre Klapper <aklapper src gnome org>]

commit f871f5c0062aa7991e1b21cb53048c85cb169211
Author: Andre Klapper <a9016009 gmx de>
Date:   Fri Mar 5 09:12:23 2021 +0100

    gnome-help: Printing: Some distros won't display an "Unlock" button
    
    Fixes #105

 gnome-help/C/printing-name-location.page         | 6 ++++--
 gnome-help/C/printing-setup-default-printer.page | 3 ++-
 gnome-help/C/printing-setup.page                 | 3 ++-
 3 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/gnome-help/C/printing-name-location.page b/gnome-help/C/printing-name-location.page
index d853cf4e..3c347895 100644
--- a/gnome-help/C/printing-name-location.page
+++ b/gnome-help/C/printing-name-location.page
@@ -52,7 +52,8 @@
       <p>Click <gui>Printers</gui> to open the panel.</p>
     </item>
     <item>
-      <p>Press <gui style="button">Unlock</gui> in the top right corner and
+      <p>Depending on your system, you may have to press 
+      <gui style="button">Unlock</gui> in the top right corner and
       type in your password when prompted.</p>
     </item>
     <item>
@@ -80,7 +81,8 @@
       <p>Click <gui>Printers</gui> to open the panel.</p>
     </item>
     <item>
-      <p>Press <gui style="button">Unlock</gui> in the top right corner and
+      <p>Depending on your system, you may have to press 
+      <gui style="button">Unlock</gui> in the top right corner and
       type in your password when prompted.</p>
     </item>
     <item>
diff --git a/gnome-help/C/printing-setup-default-printer.page 
b/gnome-help/C/printing-setup-default-printer.page
index 8fd3dd73..8e3012c5 100644
--- a/gnome-help/C/printing-setup-default-printer.page
+++ b/gnome-help/C/printing-setup-default-printer.page
@@ -58,7 +58,8 @@
       printers.</p>
     </item>
     <item>
-      <p>Press <gui style="button">Unlock</gui> in the top right corner and
+      <p>Depending on your system, you may have to press 
+      <gui style="button">Unlock</gui> in the top right corner and
       type in your password when prompted.</p>
     </item>
     <item>
diff --git a/gnome-help/C/printing-setup.page b/gnome-help/C/printing-setup.page
index 7080e7e7..a540262f 100644
--- a/gnome-help/C/printing-setup.page
+++ b/gnome-help/C/printing-setup.page
@@ -80,7 +80,8 @@
       <p>Click <gui>Printers</gui>.</p>
     </item>
     <item>
-      <p>Press <gui style="button">Unlock</gui> in the top right corner and
+      <p>Depending on your system, you may have to press 
+      <gui style="button">Unlock</gui> in the top right corner and
       type in your password when prompted.</p>
     </item>
     <item>